php simplexmlElement操作xml的命名空间实现代码_php技巧
看了这个问题,第一个反应就是namespace的关系,但我从来没有使用simplexml操作过namespace,于是就翻开手册查了一下资料,问题并没有解决,最终是通过google解决了该问题。
提问题的朋友贴出了数据源,来自于:http://code.google.com/intl/zh-CN/apis/contacts/docs/3.0/developers_guide_protocol.html#retrieving_without_query,数据结构大致如下:
这个结构在上面的地址里有,这个是我格式化过的XML数据,现在要取得类似于“
最终代码如下:
$x = new SimpleXmlElement($str);
foreach($x->entry as $t){
echo $t->id . "
";
echo $t->updated . "
";
$namespaces = $t->getNameSpaces(true);
$gd = $t->children($namespaces['gd']);
echo $gd->phoneNumber;
}
当然,如果不象上面这样写,也可以写成这样:
$x = new SimpleXmlElement($str);
foreach($x->entry as $t){
echo $t->id . "
";
echo $t->updated . "
";
//$namespaces = $t->getNameSpaces(true);
//注意这里与上面一段的区别
$gd = $t->children('http://schemas.google.com/g/2005');
echo $gd->phoneNumber;
}
只是象第二种写法就属于硬编码了,这样不太好,万一哪天有变化,还得再更改N多代码。
问题接踵而来,比如象下面这段:
这种非标准的XML,没有定义命名空间,怎么办?在这种情况下,其实SimpleXmlElement就已经直接可以解决了,但是会报warnging,因为他认为event这个命名空间不存在。
解决方法是:
$xml = @new SimpleXmlElement($str);//在前面加@抑止错误。
echo "
"; <br>print_r($xml); <br>
目前看来,这种解决方法比较好。
PHP SimpleXML 函数 相关资料
http://www.jb51.net/w3school/php/php_ref_simplexml.htm
PHP SimpleXML
http://www.jb51.net/w3school/php/php_xml_simplexml.htm

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